Statistical Testing Tools
Intuitive statistical calculators, ideal for planning and analyzing A/B tests.
Planning a test?
Figure out how many subjects you need before running your experiment.
Analyzing results?
Your experiment is done. Find out if there's a real difference.
Not sure which to use?
If your metric is a rate (% who clicked, converted, etc.), use the Chi-Squared Test. If your metric is a number (average revenue, time spent, etc.), use the T-Test.